Patent US3875968A successfully refreshed from Google Patents.
US3875968A
Expired / Lapsed
US
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Device for mixing gaseous fluids
Assignee: Jungner Instrument AB
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Filing: 1974-02-01
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Granted: 1975-04-08
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Expires: 1994-02-01
Abstract
Abstract A device for mixing at least two gases, in which the feed flow rates of the gases are controlled by means of needle valves and the relative proportions of the two gases in the gas mixture as well as the total flow rate of the gas mixture being delivered from the device can be varied. The variation of the relative proportions of the two gases in the gas mixture is independent and unaffected of the total flow rate of the gas mixture being delivered from the device, and vice versa the variation of the total flow rate of the gas mixture being delivered from the device is independent and unaffected of the relative proportions of the two gases in the gas mixture.
Inventors
- 👤 Sven Olofsson
- 👤 Sven Broddner
- 👤 Leif Bromster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:01
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/03; A; A61; A61M; A61M16/00; A61M16/10; A61M16/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87064; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
291 words
A device for mixing a first gas and a second gas, comprising first needle valve means for controlling the feed flow rate of said first gas and second needle valve means for controlling the feed flow rate of said second gas, each of said first and second needle valve means including a valve port and an axially movable valve needle cooperating with said valve port and having such a shape that the flow rate through the valve port is directly proportional to the axial displacement of the valve needle between a completely closed position and a completely open position and a longitudinally displaceable control rod coupled to said valve needle for axially displacing the same; and setting means common to said first and second valve needle means, said setting means including a first straight control bar cooperating with the control rod of said first needle valve means as a guide path therefor and a second straight control bar cooperating with the control rod of said second needle valve means as a guide path therefor, each of said first and second control bars being translationally movable in a direction perpendicular to the longitudinal direction of the cooperating control rod and pivotal about its one end for variation of the angle between the control bar and its cooperating control rod, and coupling means mechanically coupling said first and second control bars to one another in such a way that said first and second control bars form the same variable angle with the longitudinal direction of their associated control rods and are moved translationally simultaneously and over equal distances, one of them in a direction closing the associated needle valve means and the other one in a direction opening the associated needle valve means.
Claim 2
Independent Claim
291 words
A device for mixing a first gas and a second gas, comprising first needle valve means for controlling the feed flow rate of said first gas and second needle valve means for controlling the feed flow rate of said second gas, each of said first and second needle valve means including a valve port and an axially movable valve needle cooperating with said valve port and having such a shape that the flow rate through the valve port is directly proportional to the axial displacement of the valve needle between a completely closed position and a completely open position and a longitudinally displaceable control rod coupled to said valve needle for axially displacing the same; and setting means common to said first and second valve needle means, said setting means including a first straight control bar cooperating with the control rod of said first needle valve means as a guide path therefor and a second straight control bar cooperating with the control rod of said second needle valve means as a guide path therefor, each of said first and second control bars being translationally movable in a direction perpendicular to the longitudinal direction of the cooperating control rod and pivotal about its one end for variation of the angle between the control bar and its cooperating control rod, and coupling means mechanically coupling said first and second control bars to one another in such a way that said first and second control bars form the same variable angle with the longitudinal direction of their associated control rods and are moved translationally simultaneously and over equal distances, one of them in a direction closing the associated needle valve means and the other one in a direction opening the associated needle valve means.
Claim 3
Dependent Claim
73 words
A device as claimed in claim 1, wherein said first and second control bars are co-linear and rigidly joined to one another at their adjacent ends and pivotal as a unit about a pivot axis through their point of junction, said first and second needle valve means being disposed with their control rods mutually parallel and cooperating with said first bar and said second bar, respectively, on opposite sides of said pivot axis.
Claim 4
Dependent Claim
116 words
A device as claimed in claim 1, wherein said first and second bars are of equal length and mounted on a linearly movable support with one end each pivoted about a common pivot axis displaceable relative to said support in a direction perpendicular to the direction of movement of said support and their opposite ends pivoted about a second and a third pivot axis, respectively, which are stationary relative to said support and spaced apart so that the junction line between them is parallel to the direction of movement of said support, said first and second needle valve means being disposed with their control rods mutually parallel and cooperating with said first and second bar, respectively.
Claim 5
Dependent Claim
170 words
A device as claimed in claim 3 for mixing alternatively said first gas and said second gas or said second gas and a third gas, comprising third needle valve means of the same kind as said first and second needle valve means for controlling the feed flow rate of said third gas, said third needle valve means being disposed with its control rod parallel to the control rods of said first and second needle valve means on the opposite side of and equally spaced from the control rod of said second needle valve means with respect to the control rod of said first needle valve means, the lateral spacing between the control rods of said first and third needle valve means corresponding substantially to the spacing between said second and third pivot axis for said first and second bars and said movable support being displaceable over such a distance that the control rod of said second needle valve means can cooperate with alternatively said first bar or said second bar.
References Cited (Backward Citations)
US1500694A
Cited
US3809109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |